package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // ***(已完成对输入密码进行妈的加密，再去数据库比对)****
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO){
        System.out.println("当前线程的id："+Thread.currentThread().getId());

        //将dto转为实体（employee）再传给持久层mapper
        Employee employee = new Employee();

        //对象属性拷贝，源->目标实体（只拷贝源和目标相同的属性）
        BeanUtils.copyProperties(employeeDTO,employee);

        //状态（无法从dto传来的）默认正常为1
        //通过设置常量类StatusConstant调用不同属性来实现后期状态改变时的维护
        employee.setStatus(StatusConstant.ENABLE);

        //设置密码-依旧使用设置好的常量类，默认12356(md5加密)
        // getBytes() 方法会将字符串按照默认的字符编码（通常是UTF-8）转换为字节数组。
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //使用当前系统时间设置创建时间和修改时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
        //创建人id和修改人id（目前先固定写死）
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);


    }



    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */

    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO){
        //select * from employee limit 0,10(从第1页开始查询10页)
        //mybatis提供插件
        //开始分页
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        Page<Employee> page=employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> records=page.getResult();

        return new PageResult(total,records);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        //update employee set status = ？ where id = ？

//        Employee employee = new Employee();
//        employee.setStatus(status);
//        employee.setId(id);

        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .build();

        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee=employeeMapper.getById(id);
        employee.setPassword("****");
        return employee;
    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void updateInfo(EmployeeDTO employeeDTO) {
        //因为之前已经写过一个Mapper的Update的数据库语句，除了当时使用的是Employee类型其他的没有区别
        //因此可以去使用
       Employee employee = new Employee();
       //复制 EmployeeDTO 的属性到 Employee 对象(相同部分)
       BeanUtils.copyProperties(employeeDTO,employee);
       //Employee比EmployeeDTO多的部分
//       employee.setUpdateTime(LocalDateTime.now());
//       employee.setUpdateUser(BaseContext.getCurrentId());

       employeeMapper.update(employee);
    }
}
